Rapid7 Vulnerability & Exploit Database

Juniper Junos OS: 2021-10 Security Bulletin: Junos OS: QFX5110 Series: Traffic from the network internal to the device (128.0.0.0) may be forwarded to egress interfaces (JSA11236) (CVE-2021-31371)

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Juniper Junos OS: 2021-10 Security Bulletin: Junos OS: QFX5110 Series: Traffic from the network internal to the device (128.0.0.0) may be forwarded to egress interfaces (JSA11236) (CVE-2021-31371)

Severity
5
CVSS
(AV:N/AC:L/Au:N/C:P/I:N/A:N)
Published
10/14/2021
Created
10/15/2021
Added
10/14/2021
Modified
11/26/2021

Description

Juniper Networks Junos OS uses the 128.0.0.0/2 subnet for internal communications between the RE and PFEs. It was discovered that packets utilizing these IP addresses may egress an QFX5000 Series switch, leaking configuration information such as heartbeats, kernel versions, etc. out to the Internet, leading to an information exposure vulnerability. This issue affects Juniper Networks Junos OS on QFX5110, QFX5120, QFX5200, QFX5210 Series, and QFX5100 with QFX 5e Series image installed: All versions prior to 17.3R3-S12; 18.1 versions prior to 18.1R3-S13; 18.3 versions prior to 18.3R3-S5; 19.1 versions prior to 19.1R3-S6; 19.2 versions prior to 19.2R1-S7, 19.2R3-S3; 19.3 versions prior to 19.3R2-S6, 19.3R3-S3; 19.4 versions prior to 19.4R1-S4, 19.4R3-S5; 20.1 versions prior to 20.1R2-S2, 20.1R3-S1; 20.2 versions prior to 20.2R3-S2; 20.3 versions prior to 20.3R3-S1; 20.4 versions prior to 20.4R2-S1, 20.4R3; 21.1 versions prior to 21.1R1-S1, 21.1R2;

Solution(s)

  • juniper-junos-os-upgrade-latest

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